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參數(shù)資料
| 型號： | M3826AMFA-XXXGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | PLASTIC, LQFP-100 |
| 文件頁數(shù)： | 28/93頁 |
| 文件大小： | 996K |
| 代理商： | M3826AMFA-XXXGP |
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Rev.2.00
May. 24, 2006
page 34 of 90
REJ03B0028-0200
3826 Group (A version)
Serial I/O2
Serial I/O2 can be used only for clock synchronous serial I/O.
For serial I/O2, the transmitter and the receiver must use the
same clock as a synchronous clock. When an internal clock is se-
lected as a synchronous clock, the serial I/O2 is initialized and,
transmit and receive is started by a write signal to the serial I/O2
register.
When an external clock is selected as an synchronous clock, the
serial I/O2 counter is initialized by a write signal to the serial I/O2
register, serial I/O2 becomes the state where transmission or re-
ception can be performed. Write to the serial I/O2 register while
SCLK21 is “H” state when an external clock is selected as an syn-
chronous clock.
Either P62/SCLK21 or P63/SCLK22 pin can be selected as an output
pin of the synchronous clock. In this case, the pin that is not se-
lected as an output pin of the synchronous clock functions as a I/
O port.
[Serial I/O2 Control Register (SIO2CON)] 001D16
The serial I/O2 control register contains eight control bits for the
serial I/O2 functions. After setting to this register, write data to the
serial I/O2 register and start transmit and receive.
Fig. 31 Structure of serial I/O2 control register
Fig. 32 Block diagram of serial I/O2 function
Serial I/O2 control register
(SIO2CON : address 001D16)
b7
Internal synchronous clock select bits
0 0 0: f(XIN)/8
0 0 1: f(XIN)/16
0 1 0: f(XIN)/32
0 1 1: f(XIN)/64
1 0 0:
1 0 1:
1 1 0: f(XIN)/128
1 1 1: f(XIN)/256
Serial I/O2 port selection bit
0: I/O port
1: SOUT2,SCLK21/SCLK22 signal output
P61/SOUT2 P-channel output disable bit
0: CMOS output (in output mode)
1: N-channel open-drain output
(in output mode)
Transfer direction selection bit
0: LSB first
1: MSB first
Serial I/O2 synchronous clock selection bit
0: External clock
1: Internal clock
Synchronous clock output pin selection bit
0: SCLK21
1: SCLK22
b0
b2 b1 b0
Do not select
XIN
“1”
“0”
“1”
“0”
“1”
S
C
L
K
2
(Note)
1/8
1/16
1/32
1/64
1/128
1/256
Data bus
Serial I/O2
interrupt request
Serial I/O2 port selection bit
Serial I/O2 counter (3)
Serial I/O 2 register (8)
Synchronous circuit
Serial I/O2 synchronous
clock selection bit
External clock
Internal synchronous
clock select bits
D
iv
id
e
r
P63 latch
P63/SCLK22
P62/SCLK21
P61/SOUT2
P60/SIN2
P62 latch
P61 latch
(Note)
Note: It is selected by the serial I/O2 synchronous clock selection bit, the
synchronous clock output pin selection bit, and the serial I/O2 port
selection bit.
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